1 #ifndef __DALI_CONNECTION_TRACKER_INTERFACE_H__
2 #define __DALI_CONNECTION_TRACKER_INTERFACE_H__
5 // Copyright (c) 2014 Samsung Electronics Co., Ltd.
7 // Licensed under the Flora License, Version 1.0 (the License);
8 // you may not use this file except in compliance with the License.
9 // You may obtain a copy of the License at
11 // http://floralicense.org/license/
13 // Unless required by applicable law or agreed to in writing, software
14 // distributed under the License is distributed on an AS IS BASIS,
15 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 // See the License for the specific language governing permissions and
17 // limitations under the License.
21 * @addtogroup CAPI_DALI_SIGNALS_MODULE
26 #include <dali/public-api/common/dali-common.h>
27 #include <dali/public-api/signals/signal-slot-observers.h>
29 namespace Dali DALI_IMPORT_API
33 * @brief Interface used to track connections between signals and slots.
35 * Performs automatic connection and disconnection when either the slot or signal dies.
38 * class MyApp : public ConnectionTracker
40 * Button.ClickedSignal().Connect( this, &MyApp::OnPress );
44 * std::cout << "hello world" << std::endl;
49 * When MyApp is destroyed, it automatically disconnects from Button.ClickSignal.
50 * It provides a signal observer interface, to observer when signals are destroyed
51 * e.g. if Button object is destroyed while it is still connected.
53 class ConnectionTrackerInterface : public SignalObserver
60 ConnectionTrackerInterface();
63 * @brief Virtual destructor.
65 virtual ~ConnectionTrackerInterface();
68 * @brief Called when a signal is connected.
70 * @param[in] slotObserver The slot observer i.e. a signal.
71 * @param[in] callback The call back.
73 virtual void SignalConnected( SlotObserver* slotObserver, CallbackBase* callback ) = 0;
76 * @brief Query the connection count.
78 * @return The number of signal/slot connections know by the connection tracker.
80 virtual std::size_t GetConnectionCount() const = 0;
84 ConnectionTrackerInterface( const ConnectionTrackerInterface& ); ///< undefined copy constructor
85 ConnectionTrackerInterface& operator=( const ConnectionTrackerInterface& ); ///< undefined assignment operator
93 #endif // __DALI_CONNECTION_TRACKER_INTERFACE_H__